Timeline for Are there payload lights turning on and off in orbit on SpaceX STP-2?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 7, 2019 at 22:51 | vote | accept | uhoh | ||
| Jun 26, 2019 at 6:35 | comment | added | uhoh | okay, that certainly looks like reflected sunlight on droplets of something, thanks! | |
| Jun 26, 2019 at 6:25 | comment | added | amI | youtu.be/fPmPUrE5IYI?t=363 -- here (at 6:00 min) are Draco thrusters firing as a Dragon capsule prepares to dock to the ISS (I don't know if any hypergolic combustion takes place in free space; ie, wasted energy) | |
| Jun 26, 2019 at 6:05 | comment | added | uhoh | nice, that video looks very convincing! Details of the light may warrant a separate question actually, rather than make you answer that here. I also haven't figured out why F9 Merlin engines make so much light from glowing soot in air but the exhaust from the 2nd stage Merlin becomes essentially invisible once in space. I guess that also needs a separate question. | |
| Jun 26, 2019 at 6:00 | comment | added | amI | youtu.be/OcXouT8ggfI -- sorry, it's BW video and not in vacuum (basically, it's hot!) | |
| Jun 26, 2019 at 5:38 | comment | added | uhoh | Okay that makes sense, but can you expand on that a bit? Why do Drago (hypergolic) thrusters make light? Does the exhaust luminesce in some way, or is that reflected sunlight from droplets of unburned liquid or condensed reaction products, or something else? | |
| Jun 26, 2019 at 4:14 | history | answered | amI | CC BY-SA 4.0 |